South Korea's Black Eagles perform a maneuver during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center, February 16, 2016.

REUTERS/Edgar Su

2/

Cars of emergency services arrive after an explosion in Ankara, Turkey, February 17, 2016.

Reuters

3/

Harper Lee, author of "To Kill A Mockingbird," passed away on February 19. In this photo, President George W. Bush, left, awards the Presidential Medal of Freedom to Lee, center, in the East Room of the White House, November 5, 2007.

REUTERS/Larry Downing

4/

The casket of late Supreme Court Justice Antonin Scalia is carried into the Great Hall of the Supreme Court for a private ceremony in Washington, February 19, 2016, a day before his funeral service. Scalia died on February 13, 2016, at the age of 79.

REUTERS/Jacquelyn Martin/Pool

5/

Libyans celebrate the fifth anniversary of the Libyan revolution, at Martyrs' Square in Tripoli, February 17, 2016.

REUTERS/Ismail Zitouny

6/

Supporters of incumbent President Mahamadou Issoufou wear body paint at a campaign rally in Niamey, Niger, February 18, 2016. Niger will hold elections on February 21.

REUTERS/Joe Penney

7/

Former President George W. Bush speaks about the presidential candidacy of his brother, Republican presidential candidate Jeb Bush, as he appears on the campaign trail with his brother for the first time in the 2016 campaign at a rally in North Charleston, South Carolina, February 15, 2016.

The Reverend Al Sharpton is silhouetted against the podium as he awaits an address by Democratic presidential candidate Hillary Clinton at The Schomburg Center for Research in Black Culture in the Harlem neighborhood of New York City, February 16, 2016.

REUTERS/Mike Segar

10/

Riot police fire tear gas at Uganda's leading opposition party Forum for Democratic Change supporters as police and military forces disperse their procession with their presidential candidate to a campaign ground, in Kampala, Uganda, February 15, 2016.

REUTERS/James Akena

11/

A Belgian fighter from the Democratic Forces of Syria holds a cigarette in his mouth inside a military vehicle in Ghazila village after taking control of the town from Islamic State forces in the southern countryside of Hasaka, February 17, 2016.

REUTERS/Rodi Said

12/

A Sultan Murad brigade fighter, left, part of the Free Syrian Army, stands next to men they have taken as prisoners who used to fight with the Democratic Forces of Syria, in Aleppo, Syria, February 16, 2016.

REUTERS/Abdelrahmin Ismail

13/

A woman looks out of a window in a refugee-deportation registry center in Manching, near Ingolstadt, Germany, February 16, 2016.

REUTERS/Michaela Rehle

14/

Migrants' children wait to cross the border from Slovenia into Spielfeld in Austria, February 16, 2016.

REUTERS/Leonhard Foeger

15/

Hindu priests hold traditional incense lamps as they perform a ritual known as "Aarti" on the banks of Sangam — the confluence of the Ganges, Yamuna, and mythical Saraswati rivers — during the annual religious festival of Magh Mela in Allahabad, India, February 14, 2016.

REUTERS/Jitendra Prakash

16/

A customs officer stands in front of stuffed leopards in a taxidermy hall as part of a fight against the trafficking of protected species at the Museum of Natural History in Paris, France, February 16, 2016.

REUTERS/Philippe Wojazer

17/

Shop owners set off firecrackers as they open for business after the Chinese Lunar New Year holiday, in Harbin, Heilongjiang province, February 16, 2016.